Since you have more experience with older ferrets I was wondering if you could give me a couple ideas here.
I noticed about a week ago Snoopy had lost some hair on the tip of his tail. (nowhere else though.)

The thought of adrenal did go through my mind, but because it was the tip & not the base I was not as alarmed sincer there were some blackheads. I had been cleaning his tail a couple times a day & the hair started growing back. BUT...
this morning I was sitting in front of their cage and looked up at him & notices a HUGE patch of fur gone on his back. It is not gone bald, as in someone shaved him smooth, but gone like all the long hair fell out, it is falling out in clumps when you pet him.
He also has a small spot on his chest:
I don't see any signs of fleas but did notice a couple small scabs near his upper body. I am assuming from him scratching. He is about 3 years old and has never had any health problems.
Now in what I have found this could be multiple things...
Poor Nutrition, seasonal coat change, stress, adrenal, flea allergy just to name a few.
I am pretty possitive it isn't fleas... but I know we have talked about mites in
corn cob bedding... could this be something related? Also I did just recently switch foods (which shortly after is when I first noticed the tip of his tail). I am going to get some carefresh & see if that makes a difference. Also I am fully prepared to take him to the vet. I just know that there is no "sure fire" way to tell if it is adrenal or not and the vet I have been going to I am not all that confidant with when it comes to her knowledge of ferrets. I am in process of finding a new vet with more experience & knowledge, but so far have been unsuccessful.
Before I freak out (more than I already have) & jump the gun I wanted to talk to someone very knowledgable in this situation, as I am still learing.
Anything you can throw my way I would be most greatful!!